Cisco Secure Client up to 5.1.7.80 on Windows IPC signature verification

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Cisco Secure Client on Windows. Affected by this vulnerability is an unknown functionality of the component IPC Handler. This manipulation causes signature verification. This vulnerability is registered as CVE-2025-20206. The attack needs to be launched locally. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Cisco Secure Client on Windows and classified as problematic. Affected by this vulnerability is an unknown functionality of the component IPC Handler. The manipulation with an unknown input leads to a signature verification vulnerability. The CWE definition for the vulnerability is CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability in the interprocess communication (IPC) channel of Cisco Secure Client for Windows could allow an authenticated, local attacker to perform a DLL hijacking attack on an affected device if the Secure Firewall Posture Engine, formerly HostScan, is installed on Cisco Secure Client. This vulnerability is due to insufficient validation of resources that are loaded by the application at run time. An attacker could exploit this vulnerability by sending a crafted IPC message to a specific Cisco Secure Client process. A successful exploit could allow the attacker to execute arbitrary code on the affected machine with SYSTEM privileges. To exploit this vulnerability, the attacker must have valid user credentials on the Windows system.

The advisory is shared at sec.cloudapps.cisco.com. This vulnerability is known as CVE-2025-20206 since 10/10/2024. The exploitation appears to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available.

Upgrading eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• Cisco

Name

• Secure Client

Version

• 4.9.00086
• 4.9.01095
• 4.9.02028
• 4.9.03047
• 4.9.03049
• 4.9.04043
• 4.9.04053
• 4.9.05042
• 4.9.06037
• 4.10.00093
• 4.10.01075
• 4.10.02086
• 4.10.03104
• 4.10.04065
• 4.10.04071
• 4.10.05085
• 4.10.05095
• 4.10.05111
• 4.10.06079
• 4.10.06090
• 4.10.07061
• 4.10.07062
• 4.10.07073
• 4.10.08025
• 4.10.08029
• 5.0.00238
• 5.0.00529
• 5.0.00556
• 5.0.01242
• 5.0.02075
• 5.0.03072
• 5.0.03076
• 5.0.04032
• 5.0.05040
• 5.1.0.136
• 5.1.1.42
• 5.1.2.42
• 5.1.3.62
• 5.1.4.74
• 5.1.5.65
• 5.1.6.103
• 5.1.7.80

License

• commercial

Website

• Vendor: https://www.cisco.com/

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